Staurastrum retusum W.B.Turner Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Desmidiaceae genus Staurastrum species Staurastrum retusum Name Synonyms Cosmoastrum retusum (W.B.Turner) Pal.-Mordv., 1982 Homonyms Staurastrum retusum W.B.Turner Staurastrum retusum Turpin